Consolidated Statements of Changes in Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Accumulated Other Comprehensive Income	Noncontrolling Interest	General Partner	Limited Partners Common units	Limited Partners Subordinated units	NGL Supply, Inc.	NGL Supply, Inc. Class A Common Stock	NGL Supply, Inc. Additional Paid-in Capital	NGL Supply, Inc. Retained Earnings	NGL Supply, Inc. Accumulated Other Comprehensive Income	NGL Supply, Inc. Receivable From Exercise of Stock Options	NGL Supply, Inc. Noncontrolling Interest
BALANCES at Mar. 31, 2010							$ 46,403	$ 196	$ 36,039	$ 9,859	$ 84		$ 225
BALANCES (in units) at Mar. 31, 2010								19,603
Increase (Decrease) in Stockholders' Equity
Exercise of stock options								7	1,423			(1,430)
Exercise of stock options, (in shares)							650	650
Net income										(2,515)			(45)
Foreign currency translation adjustment							(15)				(15)
Dividends -
Preferred stock dividends							(17)			(17)
Common stock dividends							(7,000)			(7,000)
Increase (Decrease) in Partnership Capital
Net income (loss)							2,560
BALANCES at Sep. 30, 2010							36,811	203	37,462	327	69	(1,430)	180
BALANCES (in units) at Sep. 30, 2010								20,253
Increase (Decrease) in Stockholders' Equity
Exercise of stock options							1,430
BALANCES at Oct. 14, 2010							1,252
BALANCES at Sep. 30, 2010
Increase (Decrease) in Stockholders' Equity
Foreign currency translation adjustment	56	56
Increase (Decrease) in Partnership Capital
Combination transaction with NGL Supply (Notes 1 & 2)	1,252				1,252
Combination transaction with NGL Supply (Notes 1 and 2) (in units)					4,735,328
Acquisition of HOH & Gifford (Notes 1 & 4)	22,326				22,326
Units issued in business combinations (in units)					4,154,757
Sale of units at formation	10,981				10,981
Sale of units at formation (in units)					2,043,483
Contributions	59			59
Net income (loss)	12,679			13	12,666
BALANCES at Mar. 31, 2011	47,353	56		72	47,225
BALANCES (in units) at Mar. 31, 2011					10,933,568
Increase (Decrease) in Stockholders' Equity
Foreign currency translation adjustment	(25)	(25)
Increase (Decrease) in Partnership Capital
Units issued in business combinations, net of issuance costs (Note 4)	296,500				296,500
Units issued in business combinations (in units)					14,432,031
Distributions to partners prior to initial public offering	(3,850)			(4)	(3,846)
Conversion of common units to subordinated units					(23,485)	23,485
Conversion of common units to subordinated units (in units)					(5,919,346)	5,919,346
Sale of units in public offering, net	75,289				75,289
Sale of units in public offering, net (in units)					4,025,000
Repurchase of common units	(3,418)				(3,418)
Repurchase of common units (in units)					(175,000)
Contributions	386			386
Contributions from noncontrolling interest owners	440		440
Net income (loss)	7,864		(12)	8	6,472	1,396
Distribution to partners subsequent to initial public offering	(15,210)			(20)	(10,133)	(5,057)
BALANCES at Mar. 31, 2012	405,329	31	428	442	384,604	19,824
BALANCES (in units) at Mar. 31, 2012					23,296,253	5,919,346
Increase (Decrease) in Stockholders' Equity
Foreign currency translation adjustment	(7)	(7)
Increase (Decrease) in Partnership Capital
Units issued in business combinations, net of issuance costs (Note 4)	503,018		4,733	(52,588)	550,873
Units issued in business combinations (in units)					24,250,258
Distributions to partners	(71,682)		(74)	(1,778)	(59,841)	(9,989)
Contributions	913		403	510
Equity issued pursuant to incentive compensation plan	3,657				3,657
Equity issued pursuant to incentive compensation plan (in units)					156,802
Net income (loss)	48,190		250	2,917	41,705	3,318
BALANCES at Mar. 31, 2013	$ 889,418	$ 24	$ 5,740	$ (50,497)	$ 920,998	$ 13,153
BALANCES (in units) at Mar. 31, 2013					47,703,313	5,919,346